Finding the Fourth Proportional to 78,921.15, 108,913.53 and 43,111.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,921.15 : 108,913.53 = 43,111.76 : x
2. Step 2: Convert to fraction form
   78,921.15/108,913.53 = 43,111.76/x
3. Step 3: Cross multiply
   78,921.15x = 108,913.53 × 43,111.76
4. Step 4: Simplify right side
   78,921.15x = 4,695,453,421.55
5. Step 5: Solve for x
   x = 4,695,453,421.55/78,921.15
6. Step 6: Final answer
   x = 59,495.50